Machine tool is a machine which is moved by the manpower (Electrical, mechanical, hydraulic and pneumatic) are used to create a shape, size, and precision or accuracy (according to the design) with remove metal from a coupon or a workpiece or specimen (Workspieces) in the form of anger. Machine tools are factory equipment
to produce the machines, instruments, tools and tooling for the entire needs. It could be argued that the machine tool is the mother of all machine.
Most machine tools perform four functions, namely:
a. Keeping a job
b. Maintain cutting tools
c. Moving one or more of the rotational movement or motion back and forth
d. Provides a feed movement to rotational movement or back and forth
3.2 Classification
Machine tools can be classified in several ways.
A. Based on the scope of application, machine tools can be classified into:
a. General use machine tools
Machine tools for general use or a universal machine tools widely used to make various specimens with broad coverage includes only the pieces can make it, small lot production, and for repairs. Machine tools used for a particular scope of work is widely known with the name of multi-purpose machine tools (multipurpose). That
included into the machine tools for general use is plain turning lathes, turret lathes, milling machines, drilling machines, grinding machine and so on.
b. Single-use machine tools
This type of machine tools used to create a certain type machining operations, eg, broaching, thread cutting, gear shaping and hobbing machine, machine for machining pistons, crankshaft, for turning the camshaft and cam Contours on camshafts and so on.
c. Machine tools for limited use
Machine tools capable of this type for an operation on a narrow various kinds of workpieces, for example, automatic cutting off machines.
d. Machine tool production
Machine tools of this type are widely used manufacturing lots production, mass production, high-production features and stiffness. That included in this type of machine is a multi-tool lathes, single and multi-spindle automatic, semi-automatic lathe, plunge-cut cylindrical grinder, centreless, planer-type milling machine, thread rolling machine for tap production, numerically controlled machine tool, and so on.
e. Specialized machine tools
This type of machine tools used to create a form similar but different sizes. This type of machine tools also perform the process machining multiple surfaces on different areas. The advantage of these machine tools are able to do change from one job to another job. This can be done because install the head where there is an additional angle can be changed in the horizontal plane or vertical plane or vice versa. This machine widely used to produce large lot.
f. Machine specific tooling
This type of machine tools in design and manufactured individually with the intent to establish something on the machining operation the particular and the particular workpieces as well. Machine type These include machines for sharpening round whorls dies, mengerinda The slanted edges around the whorls dies, marking around the whorls type stalk dies and tooling, for whorls by die tap, for grinding flute on tap and reamer, tap chamfer, flutes on a twist drill, and so on. This type of machine is widely used in the production-lot production
large as well as mass.(Nafsan Upara)
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